Optimization Strategy Of Low Carbon Economy Operation Of Multi-Energy Micro-Grid Cluster Based On Game Theory

With the continuous development and change of power system forms,and the large proportion of renewable energy access to the grid,how to effectively manage distributed systems and optimize system resources,improve grid performance has become an increasingly serious problem.Multi-energy micro-grid clusters,with renewable energy as the main body,not only have good scheduling and optimization capabilities,but also improve the utilization rate of power systems,achieve energy saving and emission reduction,and promote the development of renewable energy.Therefore,this paper focuses on the cooperative optimization operation and game mechanism of multi-energy micro-grid clusters,and the main works are as follows:Firstly,a multi-energy micro-grid cluster based on the electricity-heat-gas cooptimization operation mode is studied,and the operating characteristics of the integrated electricity-to-gas and carbon capture devices,gas boilers,energy storage batteries,heat storage tanks and renewable energy generation in the multi-energy micro-grid and the corresponding unit models are analyzed.The economical and low-carbon performance of this paper using the co-optimized operation model is verified through numerical simulation.The above work provides a model basis for subsequent studies.Secondly,in order to further promote the low-carbon development of multi-energy microgrid clusters,the carbon trading mechanism and cooperative game are considered and corresponding models are proposed.Based on the establishment of a multi-energy microgrid Nash bargaining cooperative game model,a comprehensive quantization bargaining method is proposed to take the microgrid carbon trading cost into account within the microgrid bargaining capability,and the sub-problems of the model are solved by the alternating direction multiplier method.Simulation results and comparative experiments show that the proposed comprehensive quantization bargaining model can effectively improve the bargaining capabilities of each sub-microgrid and effectively achieve the low-carbon economic development of the microgrid cluster.Finally,based on the study of the cooperation operation of multi-energy microgrid cluster,further research on the master-slave relationship between multi-energy microgrid cluster and power distribution system operators,and the interaction of interests in the demand response mechanism for energy trading,a two-level game model is proposed with the power distribution network operator as the leader and the multi-energy microgrid cluster cooperation forming the micro-network alliance as the follower.For the model solution problem,a particle swarm algorithm nested improved alternating direction multiplier method is proposed for model solution.Finally,the simulation results show that the proposed method can well meet the interests of both the power distribution system operators and the micro-grid alliance;the improved algorithm has better convergence characteristics than the original method;demand response can effectively improve the load curve and reduce the system operation cost.